bears: Add JuliaLintBear

Linting for Julia using Lint.jl
https://github.com/tonyhffong/Lint.jl

Fixes coala#23

.ci/deps.osx.sh

@@ -17,6 +17,8 @@ brew install sqlite && brew link sqlite --force
 brew install openssl && brew link openssl --force
 brew install gnu-indent
 brew install go
+brew tap staticfloat/julia
+brew install julia
 
 # Install required go libraries
 go get -u github.com/golang/lint/golint
@@ -34,3 +36,6 @@ pip install -q -r requirements.txt
 
 # Calling setup.py will download checkstyle automatically so tests may succeed
 python setup.py --help
+
+# julia
+julia -e "Pkg.add(\"Lint\")"

.ci/deps.sh

@@ -11,8 +11,10 @@ esac
 
 # apt-get commands
 sudo add-apt-repository -y ppa:marutter/rdev
+sudo add-apt-repository -y ppa:staticfloat/juliareleases
+sudo add-apt-repository -y ppa:staticfloat/julia-deps
 sudo apt-get -qq update
-deps="espeak libclang1-3.4 indent mono-mcs chktex hlint r-base"
+deps="espeak libclang1-3.4 indent mono-mcs chktex hlint r-base julia"
 deps_python_dbus="libdbus-glib-1-dev libdbus-1-dev"
 deps_python_gi="glib2.0-dev gobject-introspection libgirepository1.0-dev python3-cairo-dev"
 deps_perl="perl libperl-critic-perl"
@@ -55,3 +57,6 @@ python setup.py --help
 # Dart Lint commands
 wget -nc -O ~/dart-sdk.zip https://storage.googleapis.com/dart-archive/channels/stable/release/1.14.2/sdk/dartsdk-linux-x64-release.zip
 unzip -n ~/dart-sdk.zip -d ~/
+
+# Julia commands
+julia -e "Pkg.add(\"Lint\")"

bears/julia/JuliaLintBear.py

@@ -0,0 +1,22 @@
+from coalib.bearlib.abstractions.Lint import Lint
+from coalib.bears.LocalBear import LocalBear
+from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY
+
+
+class JuliaLintBear(LocalBear, Lint):
+    executable = 'julia'
+    arguments = '-e \'import Lint.lintfile; lintfile({filename})\''
+    output_regex = r'(^.*\.jl):(?P<line>\d+) (?P<severity>.)\d+ (?P<message>.*)'
+    use_stdout = True
+    severity_map = {
+        "E": RESULT_SEVERITY.MAJOR,
+        "W": RESULT_SEVERITY.NORMAL,
+        "I": RESULT_SEVERITY.INFO
+    }
+
+    def run(self, filename, file):
+        '''
+        Lints Julia code using ``Lint.jl``.
+        https://github.com/tonyhffong/Lint.jl
+        '''
+        return self.lint(filename, file)

tests/julia/JuliaLintBearTest.py

@@ -0,0 +1,17 @@
+from bears.julia.JuliaLintBear import JuliaLintBear
+from tests.LocalBearTestHelper import verify_local_bear
+
+good_file = """
+a = 2
+println(2)
+""".splitlines(keepends=True)
+
+bad_file = """
+println(hello)
+""".splitlines(keepends=True)
+
+JuliaLintBearTest = verify_local_bear(JuliaLintBear,
+                                      valid_files=(good_file,),
+                                      invalid_files=(bad_file,),
+                                      tempfile_kwargs={"suffix": ".jl"},
+                                      timeout=45)